Get 02 4L80E Wiring Harness Diagram
PNG. Identification of the 4l80e is pretty easy. The 4l60e harnesses have red bands on the tcu and main transmission plugs.
The 4l80e is a computer controlled transmission and the successor to the th400.
There are two different starters that were used and the wires are run differently for. After all that work,,, i think this 2004 harness is already a 80e harness. The 4l80e was installed in a lot of different gm trucks and vans, so they are plentiful and easily found at a junkyard. Missing extension/plug that goes to the pedal, o2 sensors, and also the pcm.
